The digital collection Diplomatic Documents of Switzerland (DDS) is a searchable online version of the scholarly edition of sources for the history of Swiss diplomacy. The search interface of the DDS database gives you refined search possibilities with a free text field, selections from drop down lists and radio buttons. A predefined search for documents for the period 1914-1918 yields some 550 results. You can for example limit your search to terms within certain types of documents, or search for their appearance in the DDS bibliography. There is a special search interface for this bibliography. The links selection brings you to other institutions dealing with Swiss history and culture and their digital collections, and to similar projects elsewhere in Europe. The website and the database of DDS can be viewed in German, French, Italian and English.